xref: /openbmc/linux/drivers/pps/Kconfig (revision b6bec26c)
1#
2# PPS support configuration
3#
4
5menu "PPS support"
6
7config PPS
8	tristate "PPS support"
9	---help---
10	  PPS (Pulse Per Second) is a special pulse provided by some GPS
11	  antennae. Userland can use it to get a high-precision time
12	  reference.
13
14	  Some antennae's PPS signals are connected with the CD (Carrier
15	  Detect) pin of the serial line they use to communicate with the
16	  host. In this case use the SERIAL_LINE client support.
17
18	  Some antennae's PPS signals are connected with some special host
19	  inputs so you have to enable the corresponding client support.
20
21	  To compile this driver as a module, choose M here: the module
22	  will be called pps_core.ko.
23
24config PPS_DEBUG
25	bool "PPS debugging messages"
26	depends on PPS
27	help
28	  Say Y here if you want the PPS support to produce a bunch of debug
29	  messages to the system log.  Select this if you are having a
30	  problem with PPS support and want to see more of what is going on.
31
32config NTP_PPS
33	bool "PPS kernel consumer support"
34	depends on PPS && !NO_HZ
35	help
36	  This option adds support for direct in-kernel time
37	  synchronization using an external PPS signal.
38
39	  It doesn't work on tickless systems at the moment.
40
41source drivers/pps/clients/Kconfig
42
43source drivers/pps/generators/Kconfig
44
45endmenu
46